According to Freedom House, Tibet is second in the countries with the least freedom, including access to information and the media. One big concern is that China always tells something to the international community and then something to their domestic audience. Unless there is freedom of information and access to journalists about what is happening there....
That's also the reason that things are not coming out of Tibet. Forget about journalists. It's not safe for even an ordinary Tibetan to be caught sending any information out of Tibet. If you receive information into Tibet and you don't redistribute it, you are still safe, but if you redistribute it, you land in serious problems.
The free flow of information should be the basis, I think, for freeing not just the Tibetan people but also the whole of China from the grip of Chinese propaganda.